Chuck



l Oct. 27, 1925. 1,559,033

W. M. CUTLER CHUCK Y Filed July 8. 1921 2 Sheets-Sheet 1 Il Ill* q1.

amy ,V 382m? Mins Patented Oct. 27, 1925,

WALLACE M. cumplan, or' wINnsoR :pt jcns,corrlsngolrnz:udi f i L '1 ApplicationTfledfJuIy`8,

Tic-LZ2 'whom it mag/concern: f' 'Be it known that I., WALLACE av citizen of the United States',- and resident of Windsor Locks, in the county of -Hart,

5 ford, State' of Connecticut, have'inve'nted an Improvement inChucks, of which the followingudescription, in connectionwith the accompanying drawings, tis a specification, like 'characters on the. drawings represents' 10 ingi like parts. t I i .y

This invention pertains to-improvements in chucks. It is among the objects of the invention to provide chuck of superior construction in. which the jaws may be l5 opened and 'closed while the chuck isfrotatingwith the lathe spindle `or a'lfrest.`

"I'n'the drawings, which showV apreferred form of one embodiment of my invehti'onfg-- f Figure 1is a front elevationv of a' pre 50 ferred form of chuck; 'l f 1 Fig. 2 'is a section on the line 2jr-2 of Fig. 1;

`Fig. 3 Yis a section on the line of Fig. 2; and

Z5 Fig. 4 is a" section on the Aline 4 4 ofv Fig. 2." v Y Fig. 5 illustrates ayportion of the `brake mechanism.

` Referring to the drawings andv to the prel0' ferred form of my invention selected for illustrative purposes, I have shown aichuckincluding a body which may, asillustrated, include,y a face portion v8,r and hubv portion 9 held together in any suitable way,typiied l5 bythe bolts 10. The face portion 8 'of the chuck body provides slots preferably radial, as shown, in which are slidablyV mounted jaws 11, which may be of any suitable lor usual construction. In the preferred form t0 of chuck illustrated, these jaws are actu' ated toward and from the kwork by a part having .provision for turning movement relative to the chuck body 8, this part preferably, as illustrated, taking the form of a l5 scrollr12 cooperating with the chuck jaws in ythe usual manner of scroll chucks. Fea? tures of my invention are, however, ,useful in connection withv various other types of` 4 chuck-operating means than' the scroll illus- .f 0 trated. The chuck-operating part 12 illus` M. CUTL'ER, 'A

1921. "semi No; tarmac.v

trated, carries a rgear 13,*A herein 'shownfa's of the' internal type." vThe chuck" body carries i' a gearf=14, which, is also:A preferably as illus' trated of theintern'alftype. ",Rotatablel about the axis of the'chuckfbody, yI haveV provided aring 15 carryingtstuds r16A on which are` mounted differential pinions 17', 18 meshing.. respectively with theinternal gears v14,13 an'd providing differential ratios therewith so that rotation of the ring I5' relative to they chuckbody will Leffect relatively slowV movement withgreat pressure, of the gear 13 "andchuck jaw-operatingr-part 12, relative tozthe vchuclbodyh..4` Theg` mechanism hereinbefore described is somewhat"'similar tovv that described vin connection'` with my cop'ending application Serial No. 483,258, 'filedv July 8,1921. y -f I Willnow describe the preferred form of^ mechanismY for actuating the]r ring 15 in itsv rotarymovement relativeto the chuck body. Rotation of the ring15 relative to the chuck body in onedirection may, of course, be ef'- fected a simple bra'kingpinov'ement which retards or ,decelerates rotation of the'ring 15 whilethe chuckbody is being rotated on the lathe spindle.'y /This retardation may' conveniently be provided bythe brake bear'- ing against the ring 15 andV herein illusf trated "as bearing against the interior sur'- faee '20 of vsaid ring. '-To provide' for' rota-v tion ofsai'dfrhing relative tothe chuckrbody in thesame sense ofrotati'on in whichthe chuck body is rotating, I have provided planetary means typified by the planetary pinions 21'l and meshing 'with the 'intern/al gear 22 on the ringlh and'with thejexterna'l gear 23V which is rotatable relative lto the chuck body and which provides a braking' surface 24, retardation of whichfby lthe brake mechanism illustrated will,- acting through the planetary 'pinion 21, 'accelerate yrotation of the 4internal gear 22v`and'o`f Athe ring 1'5 softhatitwill rotate faster'yithhan the chuckhbodyl-is being rotated, and thus produce rotation ofthe ring 15 relative to the chuck body in a direction opposite-to that which is produced by retardation ofthe ring 15j Acceleration and retardation'"jof the ri`ngl`15 actuates, through the Ldifffjerential-l cui portion 24: of the ring 15. To provide for,

actuation of the 'chuck while the vlathe spindle is not rotating, l have provided convenient corrugated gripping surface 40 extending inwardly trom the flange 2li a.t

tached to the ring 15.

When it is desired to operate the chuck jaws in one direction, the brake ill, carried by al lever fulcrumed on the lathe, asv indicated in Fig. l, is pressed inwardlv against the surface 24, thereby retarding or stopping rot-ation of the gear with the chuck body. The pinions 2l, meshing with the gear 23, must then rotate about their own axes and move bodily in a planetary path about the axis of the chuck, this because they mesh with the internal gear 22; the gear 22 will be turned relative to the chuck body in the same direction in which the chuck body is rotating, there-by causing the disc or ring l5 to turn in the same direction, and move the pinions l? and 18 bodily in the same direction, the pinions 17 and 18 meshing in differential ratios with the gears le and 13 respectively will produce a dit ferential movement between these gears which will result in moving the chuck-operating' part l2, herein shown as a scroll, relative to the chuck body with resultant movement of the jaws toward or from the work as the case may be.

Retardation of the ring l5 may be etfected by an outward movement et the brake ll against the interior braking surface 20 and `will retard or stop rotation ot the ring l5, thereby, through the difl'erential pinions and gears, producing rotation or the jaw-operating part l2 in the opposite direction from that described in the previous paragra 3h. i

l do not claim broadly the differential gearing as herein applied to the chuck, since this is claimed in my copending applications Serial Nos. 4i-38,258 and 627,133.

`While I have shown and desc ibed a preferred f orm ci one embodiment of my invention, it will be understood that major changes involving omission, substitution, alteration and reversal of parts, and even changes in the mode oit operation, may be made without departingfrom the scope or my invention, `which is best donned in the following claims.

Claims:

l. A chuck comprising, in combination, a body, jaws, jaw-operating part mounted part relative to the chuck body and planetary means for actuating said differential means in opposite directions.

3. A chuck comprising, in combination, abody,` jaws, a jaw operating part mounted for turning movement relative to the chuck body, differential means for turning said part relative to the chuck body, planetary means for actuating said differential means in opposite directions, and brake means for selectively determining the direction of operation of said planetary means.

4f. A chuck comprising, in combination, a body, jaws, a jaw-operating 1part mounted for turning movement relative` to the chuck body, diiiierential gears on said chuck body and part, differential pinions meshing with said gears and carried by a ring rotatable about the axis of said chuck, a gear Learried by said ring, a planetary pinion meshing with said last-named gear and carried on a shaft and rotatable with the chuck body and asecond gear meshing with said planetary pinion.

A chuck comprising, in combination, a body, jaws, a jaw-operating part mounted for turning movement relative to the chuck body, differential gears on said chuck body and part, differential pinions meshing with said gears and carried by a ring rotatried by said ring, a. planetary pinion meshing with said last-r lined gear and carried on able about the axis of s d chuck, carshaft and rotatable with the chuck body.v a second meshing with said planetary pinion and selective brake means for retarding either of said gears meshing with said planetary piniona f3. fr chuck comprising, in combination, bod?, jawsT a scroll rotatablel relative to said body for actuating said jaws, a gear carried by said scroll, gear carried by said l, a ring rotatable about said body and rential pinions meshing with Tried by said ring, a L i carried by sail body and g with said o'ear carried by sai-fl ringv a second il esliing with said j. anetary iinion and rotatable relative to said body, stoppage or retardation of said second accelerating th 'itc of rota in the direc n of rotation or said body.

,7. It chuck compri, in combination, a jaws, a jaw-o acrating part mounted n ot said ring 'for turning` movement relative to said chuck bony, an internal gear carried by and ro- PTD lli

iai

tatable with said part, an internal gear eartios therewith, and planetary means for ried by and rotatable with said body, a ring actuating rotation of said ring relative to rotatable relative-to said body abontan axis said chuck body. concentric with said body, pinion-carrying In testimony whereof, I have signed-my parts carried by said ring, pinions on said naine to this specification.

pinion-carrying' parts meshing With Said internal gears, and providing diiferential ra- WALLACE M. CUTLER.` 

